Fil , B.N., Prikarpatsky , A.K. and Pritula , N.N. (1988) “Quantum Lee algebra of currents is a universal algebraic structure of symmetries of quite integrable dynamic systems”, Ukrains’kyi Matematychnyi Zhurnal, 40(6), pp. 764–768. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/9287 (Accessed: 6 December 2025).